Nas once rhymed, “I never sleep, ’cause sleep is the cousin of death.” In his excellent book, Why We Sleep, Matthew Walker, professor of neuroscience and psychology, offers the counterargument based on scientific researches. Hi studies show that sleep is more like the cousin of life than death because sleep deprivation can cause serious health risks including cancer, Alzheimer’s disease, diabetic, cardiovascular disease, stroke, congestive heart failure, depression, anxiety, and suicidality. With his approachable, engaging writing, Walker takes readers into the fascinating and wonder world of sleep. It is a must-read and required-practice. Sorry Nas, but I am rolling with the sleep expert on this one.